Current status of indoor light at night exposure during sleep among children and adolescents in Shanghai
10.16835/j.cnki.1000-9817.2025264
- VernacularTitle:上海市儿童青少年睡眠期间室内夜间光暴露现况
- Author:
QU Shuangxiao, YAO Chunxia, GAO Guiling, YANG Dongling, ZHENG Keyang, HUANG Shenglei, ZHANG Fengyun, LUO Chunyan
1
Author Information
1. Division of Child and Adolescent Health, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 201107, China
- Publication Type:Journal Article
- Keywords:
Sleep;
Light;
Environmental exposure;
Child;
Adolescent
- From:
Chinese Journal of School Health
2025;46(9):1262-1265
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To understand the indoor light at night (LAN) exposure intensity during sleep among children and adolescents in Shanghai, so as to provide a basis for exploring potential health risks and formulating effective interventions.
Methods:From April to December in 2024, a total of 628 students in grades 4-7 were recruited from three schools in Shanghai. A portable illuminance meter was used to measure LAN for one week, and participants recorded their sleep time. The Kruskal-Wallis H- test was used for comparison between groups, and the error bar chart was used to show the trend and variation range of average LAN exposure intensity in different sleep periods.
Results:The indoor LAN exposure intensity of children and adolescents in Shanghai was [2.4(0.8, 5.9)lx] during sleep, and 28.8% of children and adolescents were exposed to indoor LAN≥5 lx. There was no significant differences in indoor LAN exposure intensity between boys [2.4(1.0, 5.9)lx] and girls [2.3(0.7, 5.9)lx] ( Z=-0.86, P > 0.05 ). The indoor LAN exposure intensity of primary school students [2.9(1.1, 6.6)lx] was higher than that of junior high school students [1.0(0.3, 3.1)lx] ( Z =-5.87), and indoor LAN exposure intensity of students in the main urban area [3.2(1.1, 7.8)lx] was higher than that of rural students [1.6(0.5, 4.3)lx] ( Z =-5.23)(both P <0.05). The indoor LAN exposure intensity showed an overall decreasing trend during sleep of children and adolescents ( tau=-0.81, P =0.02), with a slight increase before waking up.
Conclusions:Indoor LAN exposure intensity among children and adolescents in Shanghai is generally high, especially among primary school students and students living in the main urban area. Health policy and education should be strengthened to reduce the impact of LAN on children and adolescent health.
